Mathew, Beena ; Rajasekharan Pillai, V. N. (1992) Metal complexation of crosslinked polyacrylamide-supported dithiocarbamates: effect of the molecular character and extent of crosslinking on complexation Proceedings of the Indian Academy of Sciences - Chemical Sciences, 104 (1). pp. 43-56. ISSN 0253-4134
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Official URL: http://www.ias.ac.in/j_archive/chemsci/104/2/43-56...
Related URL: http://dx.doi.org/10.1007/BF02843524
Abstract
Dithiocarbamate functions were incorporated into different polyacrylamide matrices crosslinked with a flexible and hydrophilic crosslinking agent, tetraethyleneglycol diacrylate (TEGDA), and their complexation behaviours were investigated. Crosslinked polyacrylamides with varying extents of the tetrafunctional TEGDA crosslinks were prepared by free radical solution polymerization at 60°C using potassium persulphate as initiator in ethanol. The dithiocarbamate functionality was incorporated into these polyacrylamides by a two-step polymer-analogous reaction involving (i)trans-amidation with ethylenediamine and (ii) dithiocarbamylation of the aminopolyacrylamide with carbon disulphide and alkali. The complexations of dithiocarbamate with Cu(II), Ni(II), Zn(II), Co(II) and Hg(II) ions were followed under different conditions. The metal ion intake varied with the extent of the crosslinking agent and the observed trend in complexation is Hg(II) >Cu(II)>Zn(II)>Co(II)> Ni (II). The time-course of complexation, the possibility of recycling, swelling characteristics, and spectral and thermal analyses were carried out. The thermal stability increases upon complexation with metal ions.
Item Type: | Article |
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Source: | Copyright of this article belongs to Indian Academy of Sciences. |
Keywords: | Polymer-metal Complexes; Crosslinked Polyacrylamide Support; Dithiocarbamate Metal Complexes; Thermal Stability |
ID Code: | 38567 |
Deposited On: | 23 May 2011 06:20 |
Last Modified: | 17 May 2016 21:22 |
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